Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net income including noncontrolling interests	$ 501	$ 483
Net income	494	479
Other comprehensive income (loss), net of taxes:
Net deferred gains (losses) on derivatives-hedging activities, net of tax	128	(85)
Changes in unrealized net gains on investment securities, net of tax	85	38
Changes in net unrecognized pension and other postretirement benefit costs, net of tax	0	25
Amounts reclassified to net income:
Net derivative (gains) losses-hedging activities, net of tax	(16)	13
Net realized gains on investment securities, net of tax	(10)	(2)
Net pension and other postretirement benefit costs, net of tax	12	14
Total other comprehensive income	199	3
Comprehensive income including noncontrolling interests	700	486
Comprehensive income attributable to noncontrolling interests	7	4
Comprehensive income	693	482
Virginia Electric and Power Company [Member]
Net income	243	278
Other comprehensive income (loss), net of taxes:
Net deferred gains (losses) on derivatives-hedging activities, net of tax	(1)	0
Changes in unrealized net gains on investment securities, net of tax	9	3
Amounts reclassified to net income:
Net derivative (gains) losses-hedging activities, net of tax	1	(1)
Net realized gains on investment securities, net of tax	(1)	0
Total other comprehensive income	8	2
Comprehensive income	$ 251	$ 280